Philosophically, what is the difference between empty space and space that will be reclaimed when you need it?
The storage medium tracks whether a cell or sector is overwritable. The filesystem tracks whether a block is allocated. And the OS tracks whether a cache is evictable.
At what layer do you consider the space “claimed”?
The storage medium tracks whether a cell or sector is overwritable. The filesystem tracks whether a block is allocated. And the OS tracks whether a cache is evictable.
At what layer do you consider the space “claimed”?